The face and the flank which include the cutting blade edge section of the tip/chip base substance which the surface grinding mannered null tungsten carbide basis of the surface canning thermet make

摘要

PROBLEM TO BE SOLVED: To provide a coated cutting tip having a hard coating layer exhibiting superior chipping resistance in high speed cutting.;SOLUTION: In this coated cutting tip, a hard coating layer including: a Ti compound layer as a bottom layer; and a two-phase mixed oxide layer (Al₂O₃-ZrO₂ layer) of aluminum oxide and zirconium oxide as a top layer is formed on the surface of a tip base by vapor deposition. On the whole surface of the two-phase mixed oxide layer (Al₂O₃-ZrO₂ layer)of the top layer, an abrasive material layer made of titanium nitride layer is formed with a means layer thickness ranging from 0.5 to 5 μm by vapor deposition. In this state, by a wet blast, polishing liquid where Al₂O₃ fine grains are mixed is injected as an injected polishing material, thereby polishing the surface of the two-phase mixed oxide layer (Al₂O₃-ZrO₂ layer) of the top layer with the abrasive material layer in the peripheral part of a tool mounting hole left undone so that the surface roughness is Ra:0.2 μm or less.;COPYRIGHT: (C)2007,JPO&INPIT